Steam-generator



(No Model.)

C. H. 8: W. A. PRESTON. STEAM GENERATOR.

No. 523,868. Patented July 31, 1894.

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CHARLES H. PRESTON AND .WILLIAM PRESTON, OF DETROIT, MICHIGAN.

STEAM-GEN ERATOR.

SPECIFICATION fori/'ning part of Letters Patent No. 523,868, dated J u1y` 31, 1894.

I Application filed March l9, i894- To all whom t may concern:

Be it known that we, CHARLES PRESTON andA WILLIAM A. PRESTON, citizens of the. United. States, residing at Detroit, in the county of Wayne and State' of Michigan, have invented certain new and useful Improvements in Steam-Generators, of which ,the following is a specification, reference being had therein to the accompanying drawing.

The invention consists in the peculiar construction of a tubular steamgenerator comprising two connecting drumsfarranged one above the other, two series of tubes extending from opposite sidesof the lower drum and connected into the upper surface of the upper drum, a grate and4 deflector plates so constructed that the products of combustion from the grate pass successively from .both seriesv of tubes before iindin g exit through theA stack, and further in the peculiarlconstruction and arrangement of these tubes'so that the products of combustion pass almost the entire length of both series of tubes, that is, from the bottom toward the top in both series, and furtl1er,in the peculiar construction, arrangement and combination of the various parts.

In the drawing, we have shown a central cross-section through a steam generator embodying our invention.

A is a lower drum, and what forV convenience sake, we will term the water drum, B is the upper or steam drum.

C is a series of vertical pipes or necks extending from the top of the drum A into the bottom of the drum B. Extending from the front upper face of the drum, A, are a series of tubes, having the inclined section D and the curved upper section E, at their upper ends they connect into the upper front face of the steam drum B.

From the rear upper face of the drum A extend a series of tubes F which have the upper curved section G connecting at their ends into the rear upper face of the drum B.

His the grate supported at' its rear end upon the forward face of the drumA and at its forward end upon a cross-bar between the water columns I. These water columns at their lower ends are connected by the pipes .I

tops they are connected together by the head stanno. 604,178. (No man.;

vK from which extends aseries of curved pipes L, connected into the upper face of the drum B. M is a defiector plate, preferably ofasbestus for other similar material arranged on top of fect of the radiation from the tire.'A The'products of' combustion are dellected from the plate M startingfrom the base of the section D of the forward tubes upwardly between the plate kM and the casing O, then downward between the upper end of the casing Mand the drum B between the two drums below fthe plate N starting at the base of the tubes F and thence upwardly through those tubes to the smoke stack, thus it will be seen that the heat traverses the entire length of both sections of tubes starting from the bottom and going to the top in both instances.

We may and preferably do, arrange a third 'series of pipes Q extending centrally from the top of the drum'A into the lower portion of the drum B above the plate M, so as to more eectually use the products of combustion while passing downward from the upper por-v tion E of the tubes between the two drums.

What we claim as our invention isl. In a steam generator, the combination with the casing of the water drum and the steamdrum arranged one above the other and connected, the two series of relatively different inclination water tubes extending from opposite sides of the water drum and cona nected at their upper ends into opposite sides of the steam drum, and deiiector plates arranged to direct the products of combustion successively through both series of the tubes,

substantially as described. v

2. In a steam generator, the combination with the casing of the water drum and steam drum vertically arranged and connected, of

the two sets of dierently inclined curved water tubes connected from opposite sides of the water drum into the steam drum the grate, and the deflector plates so arranged that the products of combustion pass over both series of water tubes successively from the bottom to the top, substantially as described.

3. In a steam generator, the combination with the casing of the water drum A, the steam drum B above the same, the vertical pipes C connecting the two drums, a series of water tubes extending from the front upper face of the water drum and connecting into the frontupper face of the steam drum, comprising the forward inclined section D and the return curved section E, aseries of water tubes connected into the rear upper face of the water drum and the rear upper face of the steam drum comprising the sections F and G, the deiector plates arranged as described, the water tubes Q between the deflector plates, the water columns I at the front connected at their lower ends into the water drum and connected at their upper ends by a cross-head K and the water tubes L extending from said cross-head into the top of the steam drum the parts arranged as and for the purpose described.

4. In a steam generator, the combination of the water drum, the steam drum ,above the same, the vertical pipe connecting the two face of the water drum and the rear upper face of the steam drum, comprising the inclined section F and the curved section- G, and a deeotor plate on the front face of the section F, and a covering O arranged around the outside of the forward series of tubes, substantially as described.

In testimonywhereof wealiix oursignatu res in presence of two witnesses.

CHARLES PRESTON. WILLIAM A. PRESTON.

Witnesses:

M. B. ODOGHERTY, O. F. BARTHEL. 

